MESON Chess Problem Database

Problem Display
PID: 6259 (4QbB1/4q1p1/8/2PpkpR1/rN2P2K/pbR1p1N1/2P1P3/B7 w - - 0 1)

Schiffmann, Israel Abraham

De Problemist, 1928

4QbB1/4q1p1/8/2PpkpR1/rN2P2K/pbR1p1N1/2P1P3/B7

#2

12 + 10

1397 Faszinierendes Schachproblem 1963
721 Variantim 1989
721 Variantim 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Sc6#
    • 1...Kf4
      • 2.Sd3#
    • 1...Kf6
      • 2.Rxf5#
  • Tries
    • 1.Sd3+?
      • 1...Kf6
        • 2.Sh5#
        • 2.Rxf5#
        • 2.Rg6#
        • 2.Qg6#
      • 1...Kd4!
    • 1.Sc6+?
      • 1...Kf6
        • 2.Sh5#
        • 2.Rxf5#
        • 2.Rg6#
        • 2.Qg6#
      • 1...Kf4!
    • 1.Rxb3+?
      • 1...Kf4
        • 2.Sd3#
        • 2.Sxd5#
      • 1...d4!
    • 1.Rxe3+?
      • 1...Kf4
        • 2.Rf3#
      • 1...d4!
    • 1.Rc4+?
      • 1...Kf4
        • 2.Sh5#
        • 2.Sd3#
        • 2.Sxd5#
      • 1...d4!
    • 1.Qxe7+?
      • 1...Kd4
        • 2.Sxf5#
        • 2.Sc6#
      • 1...Kf4
        • 2.Sh5#
        • 2.Sd3#
        • 2.Rxf5#
      • 1...Bxe7!
  • Keys
    • 1.exd5!
      • threat
        • 2.Rc4#
      • 1...Kd4
        • 2.Sc6#
      • 1...Kf4
        • 2.Sd3#
      • 1...Kf6
        • 2.Rxf5#
      • 1...Bc4
        • 2.Rxc4#

This is after

After Weenink.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);N_SPINP(g),N_SPINQ(h),S_FLIGHT::S(F)
    • K(f);N_PINR(J),N_SPINP(g),N_SPINQ(h),S_FLIGHT::R1(J),XP(g)
  • Tries
    • Try
      • S(F);CHECK,P_SPINP(G)
      • Refutation
        • K(f);N_PINP(G),N_SPINP(g),N_SPINQ(h),S_FLIGHT
    • Try
      • S(F);CHECK,P_SPINP(G)
      • Refutation
        • K(f);N_PINP(G),N_SPINP(g),N_SPINQ(h),S_FLIGHT
    • Try
      • R(D);CHECK,XB(b)
      • Refutation
        • P(e);N_SPINP(g),P_SPINP(e)
    • Try
      • R(D);CHECK,XP(c)
      • Vars
        • K(f);N_SPINP(g),N_SPINQ(h),S_FLIGHT::R1(D)
      • Refutation
        • P(e);N_SPINP(g),P_SPINP(e)
    • Try
      • R(D);CHECK
      • Refutation
        • P(e);N_SPINP(g),P_SPINP(e)
    • Try
      • Q(K);CHECK,N_SPINR(J),XQ(h)
      • Refutation
        • B(j);P_PINR(J),XQ(K)
  • Actual
    • P(G);P_SPINS(F),XP(e)
    • Threat
      • B(A)+R(D)
    • Vars
      • K(f);N_PINS(F),N_SPINP(g),N_SPINQ(h),S_FLIGHT::S(F)
      • K(f);N_PINR(J),N_SPINP(g),N_SPINQ(h),S_FLIGHT::R1(J),XP(g)
      • B(b);N_PINS(F)::B(A)+R(D),XB(b)
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